Investigation of Self-Assembly Processes for Chitosan-Based Coagulant-Flocculant Systems: A Mini-Review.
Investigation of Self-Assembly Processes for Chitosan-Based Coagulant-Flocculant Systems: A Mini-Review.
复制标题
DOI：
10.3390/ijms17101662
复制
发表时间：
2016-09-30
影响因子：
5.6
通讯作者：
Wilson LD
中科院分区：
文献类型：
--
作者：
Bhalkaran S;Wilson LD
废水中污染物的存在对水处理工艺和环境修复提出了重大挑战。混凝-絮凝法是一种简便有效的去除水中带电粒子的方法。形成稳定的胶体絮凝体是絮凝体聚集所必需的，因此，它们随后被去除。当这些絮凝物通过聚电解质的自组装形成扩展网络时，例如基于胺的多糖（壳聚糖），其在絮凝物网络中形成聚合物“桥”，从而发生聚集。本概述的目的是评估如何自组装过程中的壳聚糖及其衍生物的影响有关的因素的形态壳聚糖（絮凝剂）和溶液条件的作用，在壳聚糖及其改性形式的絮凝性能。壳聚糖已单独使用或与盐如硫酸铝结合使用，作为去除各种水性污染物的助剂。改性壳聚糖涉及将阴离子或阳离子基团接枝到壳聚糖的葡糖胺单体上的C-6羟基或C-2处的胺基上。通过改变参数，如壳聚糖的分子量和脱乙酰度，pH值，反应和沉降时间，剂量和温度，自组装可以进一步研究。这篇迷你评论强调了海洋生物聚合物壳聚糖的絮凝和自组装过程的分子水平细节。
The presence of contaminants in wastewater poses significant challenges to water treatment processes and environmental remediation. The use of coagulation-flocculation represents a facile and efficient way of removing charged particles from water. The formation of stable colloidal flocs is necessary for floc aggregation and, hence, their subsequent removal. Aggregation occurs when these flocs form extended networks through the self-assembly of polyelectrolytes, such as the amine-based polysaccharide (chitosan), which form polymer “bridges” in a floc network. The aim of this overview is to evaluate how the self-assembly process of chitosan and its derivatives is influenced by factors related to the morphology of chitosan (flocculant) and the role of the solution conditions in the flocculation properties of chitosan and its modified forms. Chitosan has been used alone or in conjunction with a salt, such as aluminum sulphate, as an aid for the removal of various waterborne contaminants. Modified chitosan relates to grafted anionic or cationic groups onto the C-6 hydroxyl group or the amine group at C-2 on the glucosamine monomer of chitosan. By varying the parameters, such as molecular weight and the degree of deacetylation of chitosan, pH, reaction and settling time, dosage and temperature, self-assembly can be further investigated. This mini-review places an emphasis on the molecular-level details of the flocculation and the self-assembly processes for the marine-based biopolymer, chitosan.
登录
查看更多内容
DOI：
10.1016/j.colsurfa.2011.01.051
发表时间：
2011-06-20
影响因子：
5.2
作者：
Barany, S.;Meszaros, R.;Skvarla, J.
通讯作者：
Skvarla, J.
影响因子：
15.1
作者：
Bergamasco, Rosangela;Konradt-Moraes, Leila Cristina;Salcedo Vieira, Angelica Marquetotti
通讯作者：
Salcedo Vieira, Angelica Marquetotti
影响因子：
4.5
作者：
Cuellar Martinez, Tomasa del Carmen;Rodriguez, Rosalba Alonso;Morquecho, Lourdes
通讯作者：
Morquecho, Lourdes
影响因子：
9.9
作者：
Pallier, Virginie;Feuillade-Cathalifaud, Genevieve;Bollinger, Jean-Claude
通讯作者：
Bollinger, Jean-Claude
影响因子：
13.6
作者：
Baskan, Meltem Bilici;Pala, Aysegul
通讯作者：
Pala, Aysegul